Car specific maybe? I was able to charge at -30C outside from a 120V outlet last winter.

Scribus has really good PDF support. It’s a full desktop publishing program (like InDesign), so it might not be the best for quick conversions. It does a really good job of PDF forms though.

It’s not a hard real time OS though. Real Time Linux would be appropriate for some subsystems in a car, but not for things that are safety critical with hard timing constraints, e.g. ABS controllers.

Honestly, they can just send the keywords. No need to send audio if they can match 1000 or so words that are most meaningful to advertisers and send counts of those.

AFAIK this is only speculated, not proven.